Remove unused methods from GraphicsContextState

Source/platform/graphics/GraphicsContextState.h

 // Copyright (C) 2013 Google Inc. All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //    * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //    * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
@@ skipping 58 matching lines @@
     void incrementSaveCount() { ++m_saveCount; }
     void decrementSaveCount() { --m_saveCount; }
 
     // Stroke data
     Color strokeColor() const { return m_strokeColor; }
     SkColor effectiveStrokeColor() const { return applyAlpha(m_strokeColor.rgb()); }
     void setStrokeColor(const Color&);
 
     Gradient* strokeGradient() const { return m_strokeGradient.get(); }
     void setStrokeGradient(const PassRefPtr<Gradient>, float);
-    void clearStrokeGradient();
 
     Pattern* strokePattern() const { return m_strokePattern.get(); }
     void setStrokePattern(const PassRefPtr<Pattern>, float);
-    void clearStrokePattern();
 
     const StrokeData& strokeData() const { return m_strokeData; }
     void setStrokeStyle(StrokeStyle);
     void setStrokeThickness(float);
     void setLineCap(LineCap);
     void setLineJoin(LineJoin);
     void setMiterLimit(float);
     void setLineDash(const DashArray&, float);
 
     // Fill data
     Color fillColor() const { return m_fillColor; }
     SkColor effectiveFillColor() const { return applyAlpha(m_fillColor.rgb()); }
     void setFillColor(const Color&);
 
     Gradient* fillGradient() const { return m_fillGradient.get(); }
     void setFillGradient(const PassRefPtr<Gradient>, float);
-    void clearFillGradient();
 
     Pattern* fillPattern() const { return m_fillPattern.get(); }
     void setFillPattern(const PassRefPtr<Pattern>, float);
-    void clearFillPattern();
 
     // Path fill rule
     WindRule fillRule() const { return m_fillRule; }
     void setFillRule(WindRule rule) { m_fillRule = rule; }
 
     // Shadow. (This will need tweaking if we use draw loopers for other things.)
     SkDrawLooper* drawLooper() const { return m_looper.get(); }
     void setDrawLooper(PassRefPtr<SkDrawLooper>);
     void clearDrawLooper();
 
@@ skipping 67 matching lines @@
 
     uint16_t m_saveCount;
 
     bool m_shouldAntialias : 1;
     bool m_shouldClampToSourceRect : 1;
 };
 
 } // namespace blink
 
 #endif // GraphicsContextState_h